title: Analytical evaluation of Cu2+ selective behavior of calix[4]arene derivative.
abstract: The present article describes the solvatochromic effect including solvent system selection, time study and a detailed complexation study along with exploration of extraction properties of 5,11,17,23-tetrakis[(diethylamino)methyl]-25,26,27,28-tetrahydroxycalix[4]arene (4) that bears nitrogen atom as a donor group available for chelating metal ions. Complexation properties of 4 toward selected transition metal ions have been investigated by UV-visible and fluorescence spectroscopies. The% efficiency of 4 toward selected transition metal ions was found in order Cu(2+)>Ni(2+)>Hg(2+)>Zn(2+)>Co(2+)>Cd(2+)>Pb(2+). It has been noticed that 4 is not only proved to be an efficient Cu(2+) selective chromoionophore but also possesses an effective extraction property for transferring Cu(2+) ions from an aqueous to dichloromethane layer. The FT-IR spectroscopic method has also been applied for further confirmation of the complexation phenomenon of 4 with Cu(2+) ion and found adequate.
authors.affiliation: National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan. great_mansoor91@yahoo.com
authors.forename: Mansoor Ahmed
authors.initials: MA
authors.lastname: Qazi
authors.forename: Imdadullah
authors.initials: I
authors.lastname: Qureshi
authors.forename: Shahabuddin
authors.initials: S
authors.lastname: Memon
mesh_terms: D047250:Calixarenes / Q000737:chemistry*; D003300:Copper / Q000032:analysis*; D005453:Fluorescence; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D009942:Organometallic Compounds; D010636:Phenols; C121325:calix(4)arene; D047250:Calixarenes; D003300:Copper